Add on - rhino import not working
The add-on is just a wrapper for the rhino3dm package, which is currently missing on your system.

The following steps should allow you to install the missing Python package:


Open Blender and switch to the Scripting workspace.
In the Text Editor press the + New button.
Copy and paste the following script into the editor.


import bpy
import subprocess

try:
    output = subprocess.check_output([bpy.app.binary_path_python, '-m', 'pip', 'install', 'rhino3dm'])
    print(output)
except subprocess.CalledProcessError as e:
    print(e.output)



For Blender &lt;2.83: Run the script by clicking on the Run Script button. For Blender >=2.83: Press the button with the play icon (triangle).
Enable the add-on in the preferences.